The use of a Stingray/Hailstorm device to track a cell phone is a search under the Fourth Amendment. The Nondisclosure Agreement is essentially unconstitutional because of the state’s argument they don’t have to disclose what they were doing. The court also finds the third party doctrine inapplicable. State v. Andrews, 2016 Md. App. LEXIS 33 (March 30, 2016)
Read more about the opinion on FourthAmendment.com.